1
By TED-Ed
Published in 2014
In a fun, excited talk, teenager Henry Lin looks at something unexpected in the sky: galaxy clusters. By studying the properties of the unverse's largest pieces, says the Intel Science Fair Winner, we can learn quite a lot about our own world ad galaxy.
Grade Level   6 7 8 9 10 11 12
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2
By TED-Ed
Published in 2013
"In this short talk, TED Fellow Sarah Parcak introduces the field of """"space archeology"""" -- using satellite images to search for clues to the lost sites of past civilizations."
Grade Level   3 4 5 6 7 8 9 10 11 12
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3
By TED-Ed
Published in 2013
How can the shadow of the tiny moon eclipse the sight of the gargantuan sun? By sheer coincedence, the dsc of the sun in 400x larger than the disc of the moon, but it's 390x farther from Earth -- which means that when they align just right, the moon blocks all but the sun's glowing corona. Andy...
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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4
By TED-Ed
Published in 2013
What's six miles wide and can end civilization in an instant? An asteroid -- and there are lots of them out there. With humor and great visuals, Phil Plait enthralls the TEDxBoulder audience with all the ways asteroids can kill, and what we must do to avoid them.
Grade Level   6 7 8 9 10 11 12
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5
By TED-Ed
Published in 2015
There's a lot of talk these days about when and how we might all move to Mars. But what would it actually be like to live there? Mari Foroutan details the features of Mars that are remarkably similar to those of Earth — and those that can only be found on the red planet.
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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6
By TED-Ed
Published in 2015
The International Space Station is roughly the size of a six-bedroom house and weighs more than 320 cars -- it's so large that no single rocket could have lifted it into orbit. Instead, it was assembled piece by piece while hurtling through space at 28,000 kilometers per hour, lapping the Earth once...
Grade Level   6 7 8 9 10 11 12
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7
By TED-Ed
Published in 2017
In 1995, scientists pointed the Hubble Telescope at an area of the sky near the Big Dipper. The location was apparently empty, and the whole endeavor was risky -- what, if anything, was going to show up? But what came back was nothing short of spectacular: an image of over 1,500 galaxies glimmering...
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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8
By TED-Ed
Published in 2013
It's been a long road to the discovery that Earth is not the center of the Solar System, the Milky Way, or the universe; great thinker from Aristotle to Bruno have grappled with it for millenia. But if we aren't at the center of the universe, what is? Marjee Chmiel and Trevor Owens discuss where we...
Grade Level   9 10 11 12
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9
By TED-Ed
Published in 2015
Just now, somewhere in the universe, a star exploded. In fact, a supernova occurs every second or so in the observable universe. Yet, we've never actually been able to watch a supernova in its first violent moments. Is early detection possible? Samantha Kuula details the science behind an early...
Grade Level   9 10 11 12
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10
By TED-Ed
Published in 2014
When we look at the sky, we have a flat, two-dimensional view. So how do astronomers figure the distances of stars and galaxies from Earth? Yuan-Sen Ting shows us how trigonometric parallaxes, standard candles and more help us determine the distance of objects several billion light years away from...
Grade Level   11 12
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11
By TED-Ed
Published in 2014
Our best technology can send men to the Moon and probes to the edge of our solar system, but these distances are vanishingly small compared to the size of the universe. How then can we learn about the galaxies beyond our own? Yuan-Sen Ting takes us into deep space to show how astronomers study the...
Grade Level   11 12
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12
By TED-Ed
Published in 2014
We only know 4% of what the universe is made up of. Can we also know what lies beyond our galaxy ... and if there are undiscovered forms of matter? Luckily, we have space messengers — cosmic rays — that bring us physical data from parts of the cosmos beyond our reach. Veronica Bindi...
Grade Level   11 12
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13
By TED-Ed
Published in 2014
The atoms around you have existed for billions of years -, and most originated in the flaming, gaseous core of a star. Dennis Woldfogel tells the captivating tale of these atoms' long journey from the Big Bang to the molecules they form today.
Grade Level   9 10 11 12
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14
By TED-Ed
Published in 2013
The shape, contents and future of the universe are all intricately related. We know that it's mostly flat; we know that it's made up of baryonic matter (like stars and planets), but mostly dark matter and dark energy; and we know that it's expanding constantly, so that all stars will eventually burn...
Grade Level   9 10 11 12
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